Saw.



PATENTEDAPR. 25. 1905. E. E. BARTHCLOMBW. v

SAW. APPLICATION IILED !UNE 22. 1904.

/r fak/veya No'. 788.236. i

I UNITE STATES ?tented April 25, 1905.

P TENT OFFICE.

EUGENE E. BARTHOLOMJ'E'W OF CLEVELND, OHIO. -ASSIGNOR TO THE SINGLESTAVE BARREL COMPANY, OF CINUINNATI, .OHIO, A CORPO- RATION OF OHIO.

sAw. v v

SPECIFICATION forming m of Letters ratent No. 7sa,23e, dated April 25,1905.

A li tion fil d June 22, 1904. Seril No. 213.610.

T I) all whom, it my nnncer:

Be it known that I, EUGENE E. BARTHOLO- Mew, residing at Cleveland inthe 'county ot' Cuyahoga and State ot' Ohio have inrented a certain newand useful Improvement in Saws, of which the following is a full, clear,and exact description., reference being had to the accompanyingdrawings.

My invention relates to saws, and particularly to a saw constructed tocut a V-shaped kerf-as, for example, alteri' such asis formed in theends ot' a wide barrel-stave or of a single veneer barrel-blank, so asto provide for the contraetion of the body of the barrel at the chime.

- The object of my invention is to construct a saw of this characterwhich shall be efiicient in operation and simple and economical inco'structon.

'The invention' may be defined generally as consi tingof thecombinations of elements embodicd in the claims hereto annexed.

Referring to the drawings, Figure 1 represents a side elevation ot' asaw embodying my invention. Fig. 2 is a transverse section on the line 22 of Fig. I looking in the direction of the arrow. Fig. 3 represents anenlarged sectional detail on the line 3 3 of Fig. 1 looking in thedirection of the arrow. Fig. 4 represents a sectional detail showing amodification ot' the saw embod ed in the prcceding figure; and Fig. 5represents a detail ot' a barrelstave, showing the form ot' kerf cut bythe saw.

\\'hile my invention might be applied to saws of other forms,I prefer asaw of the circular type, (designated by the numeral 1 in Fig. 1.) Aswill be apparent from an inspec- 'tion of the drawings, this saw isprovided with a number of cutters projecting from the body portionthereof. A convenient manner of forming such cutters is by cuttingapertures 2 in the body of the saw and bending therefrom tongues 3. Theedges 4 of such tongues are beveled to form cntting-surfaces, and suchedges are obliquelydisposed with reference to the direction of thecutting motion of the saw., whether the saw be circular, as shown,

or of the ordinary straight-edge type. In the case of a circular saw theedges will be inelined with respect to the radii thereof as well asinclined with respect to the direction of the cutting motion of the saw.In both types of saw the inclination is such that the portion of thecutter edge adjacent to the teeth of the saw will be in advance of theother portions of said edge, whereby said cutter will readily shearthrough the stave or blank.

In formim; the cutters the tongues are bent out alternatel y fromopposite faces of the saw, are systematically arranged, and increasegrad ually and progressively in length from the circumferenee toward thecenter or inactive part-of said saw. the number and arrangement of thetongues being such as to cause the saw to cut a substantially uniformV-shaped kerf, such as shown in Fig. 5.

In addition to the tongues 3 the saw is provided with the usual teeth 5.In operation the saw enters the stave or blank 6 from the end thereof,cutting the V-shaped kerfs 7 therein. I have not shown the manner ofmounting the saw, as it may be used on any suitable frame and arbor, anda number of such saws may be mounted in gangs, if desired.

Where, owing to the number or size of the perforations in the saw, thereis danger of unduly weakening the same, I may construct the saw in themanner shown in Fig. 4. As will appear from said figure, the portion ofthe body of the saw adjacent to the teeth 5 may gradually increase inthickness, as shown at 8, until the desired thickness for the body isSecured, as shown at 9, to conpensatc for the weakening of the body dueto the perforations therein.

From the fore/going description it will be apparent that l have produceda saw which is simple in construction and which will effectively preparestaves or blanks for shaping up into a barrel and which owing to thesharpness of the cutters and the oblique disposition of the same, willproduce a clean cut in the stave or blank without fraying or splinteringthe material. i

`eutters more remote from the edge projecting further than those ncarerthe edge.

` 2. A saw havingcutters projectinglaterally from both faces thereofarranged in series from the cutting edge toward the inactive part, the

cut-ters more remote from the edge projccting ,further than thosenear-er the edge.

A circular saw having cutters projecting latcrally from the facethcreot' arranged in series from the edge toward the center, the cuttcrsnearer the center projecting further than those neurer the edge.

4, A circular saw having cutters projecting laterally from both facesthereof armnged in series from the edge or perimeter toward the center,the cutters nearer the center projecting farther than those nearer theedge.

5. A circular saw having cutters projecting laterally from both facesthereof arranged in series from the edge or perimeter toward the center,the cntters nearer the center projecting farther than those nearer theedge and the amount of such projection decreasing gradually from thecenter toward the edge.

In testimony whereot' Iaflx my signaturein the presence of twowitnesses.

EUGEN E E. BARTHOLOMEW'. \Vitnesses:

J. B. HUM., E. M. .L. HADIG.

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